Scraping-tool and the like



N. W. DINGWALL.

SCRAPING TOOL AND THE LIKE.

APPLICATION FILED APR. 24, 1919.

1,341,047, Patented May 25, 1920.

NELSON W. DINGWALL, OF MOUNT VERNON, NEW YORK.

SCRAPING-IOOL AND THE Lina.

Specification Letters Patent.

Patented May 25, 1920.

Application filed April 2 4, 1919. Serial No. 292,431.

My invention relates to scraping and polishing tools and is particularlyuseful in connection with a tool designed to scrape and finish surfaceplates and the ways of shapers,

planers and machine tools in neral. It can also be used for frosting suraces. Also for scraping ofi' scale on lates.

My invention is essentia 1y an improvement upon a similar tool inventedby J. S. Holland and made the subject-matter of a United tatesapplication Serial No. 289,023, filed April 10. 1919, and has for itsobject sim lifying the construction, increasing the efliciencyand'durability thereof and so ar-' ranging the various parts that thetool may be very easily manipulated. These and other advantagesthereover will be understood by a mechanic skilled in the art from anexamination of the following specification and the accompanying drawing,in which:

Figure 1 is a longitudinal sectional view showing some of the parts inside elevation.

Fig. 2 is an end view.

Fig. 3 is a detail view.

Fig. 4 is a perspective view of other details.

1 represents the main body or housing which may be constructed in anysuitable way and which is provided on its ower side with a smooth curvedsole 2 which may be either integral with the body or may be in the formof a veneer as shown, and when in the form of a veneer ma be made of anysuitable material which wi 1 permit the tool to be su ported upon apolished surface and slid and rocked to and fro without in jury thereto.3 is a tool carrier mounted in the front end of the housing 1 insuitable ways and arranged to be reciprocated to and fro. At the innerend of the carrier 3 is a suitable socketed portion 4 into which rojectsthe edge of what I may term a w eel cam 5 mounted upon a shaft 6 whichhas suitable bearin in the housing 1 so that the axis of the shaft willbe substantially in the longitudinal center line of the housing 1. Therear end of the shaft 6 may be connected with any suitable source of weras by a flexible shafting 6, or indee a suita le motor may be mounteddirectly thereon and carried at the rear of the housing so as to be partof the tool, in which event the part 6' may be treated as conventionallyrepresenting such a source of driving power. 6 is a thrust collar on theshaft 6. 1 is an internal center bearin for supporting and taking theforward t rust of the cam 5. The rear plate 1' of the case may bedetachably secured in any suitable manner, and the space within thecase-is preferably ease-tig t so that the interior may be lled withgrease whereby the cam will constantly run therein. 7 is a handle on thetop of the housing 1 preferably near the front end. 8 is a handleprojecting rearwardly from the housing and preferably upturnedsubstantially as shown to afford an easy grip. 9 re resents a tool, inthis particular instance aving a scraping edge at its forward end. 3 reresents a transversely scored surface on t e carrier, while 9 representsa correspondingly scored surface at the rear part of the tool 9 wherebythe tool 9 when secured to the carrier will be more effectively held,and the strain on the fastening bolts or screws 10-10 will becorrespondingly lessened.

In operation: When the cam 5 revolves, it will impart a positivereciprocating motion both to and fro to the carrier 3 and hence to thetool 9, the action of the cam being in uniform and constant engagementwith the inner end of the carrier 3, and by reason of the character ofthe cam will reduce very much the shock and wear on the parts.Furthermore, by arranging the shaft 6 of the cam substantially in linewith the work to be done, that is to say, in line with the tool, it willbe so positioned that in actual use there will be no danger of saidshaft striking against any part or piece of machinery located at eitherside of the tool, the effect of which would be to deflect the point ofthe cutter or tool 9.

What I claim is:

In a tool of the character described, a housing having a curved soleportion to permit said housing to be canted to and fro upon a supportingsurface, a tool carrier mounted to reciprocate in the front end of saidhousing, the forward end of said tool carrier being arranged to receivea tool, the

rear end of said tool'carrier extending into the space Within thehousing, a shaft rotatably mounted in the rear of the housing, a

NELSON W. DIN GWALL.

